no output from test machine (3)

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 7137d9bb adjust functions for new const in drm MI code; ok..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12866923100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=462539bc18fef8fc26cc

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+462539...@syzkaller.appspotmail.com



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[syzbot]

syzbot has found a reproducer for the following crash on:

HEAD commit: 09dd33a6 Clarify that csh's -f flag is not just about .csh..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1019dc67100000
kernel config: https://syzkaller.appspot.com/x/.config?x=fe55924c11e64b0a
dashboard link: https://syzkaller.appspot.com/bug?extid=462539bc18fef8fc26cc
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13b50133100000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1138da0b100000

[Anton Lindqvist]

#syz fix: A pty write containing VDISCARD, VREPRINT, or various retyping cases of VERASE would perform (sometimes irrelevant) compute in the kernel which can be heavy (especially with our insufficient tty subsystem locking). Use tsleep_nsec for 1 tick in such circumstances to yield cpu, and also bring interruptability to ptcwrite() https://syzkaller.appspot.com/bug?extid=462539bc18fef8fc26cc ok kettenis millert, discussions with greg and anton